# COLREG 72: safety at sea — Navigation Rules & Exam Prep

> Interactive flashcards for learning International Regulations for Preventing Collisions at Sea (COLREGs). (iPhone/iPad app by Smirnov Yury.)

- Source: https://appshunter.io/ios/app/colreg-72-safety-at-sea/id1010178487 (this page in markdown: same URL + `.md`)
- Developer: [Smirnov Yury](https://appshunter.io/developer/420438416)
- Category: Education, Navigation
- Price: $3.99
- Rating: 4.80/5 from 117 App Store ratings · 17 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 103 MB
- Languages: British English, French (France), Russian, European Spanish
- Released: 2015-06-30
- Data updated: 2026-09-02
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/colreg-72-safety-at-sea/id1010178487/reviews.md

## What is COLREG 72?

COLREG 72 is a complete study and reference app for the International Regulations for Preventing Collisions at Sea (COLREGs). Built for maritime students, merchant navy officers, yacht captains, and anyone preparing for a maritime exam.

WHAT IS INCLUDED

- Full text of all 72 COLREG rules (Annexes I through IV)
- Theory study with illustrations
- Navigation lights identification quizzes
- Rule-based tests with answer explanations
- Exam mode — a timed mock exam across all the rules with a final score and a full mistake review
- Cross-references between rules and theory — open in popup overlays so you never lose your place

HOW IT WORKS

Theory and rules are linked throughout the app. When you answer a quiz question incorrectly or open a hint, a direct link appears to the exact theory section that covers the topic. Review the rule, then return to the quiz.

The app tracks which theory sections you have read, so you always know where you left off and what still needs attention.

EXAM MODE

Simulate the real test. The exam is timed and draws questions from across all the rules. When time runs out, you get a clean result screen with your score and every mistake listed. Tap a wrong answer to see the explanation, the original comment from the question card, and a direct link to the relevant rule — so every attempt teaches you something.

READING

Reading is fully customizable: choose from multiple font types, adjust the font size, and switch between three color themes — light, sepia, and dark — for comfortable study in any lighting condition. Layouts are tuned for both iPhone and iPad.

WHO IT IS FOR

- Maritime students at nautical colleges and academies
- Merchant navy officers preparing for OOW, Chief Mate, or Master exams
- Yacht skippers and RYA / ASA candidates
- Coastal and offshore sailors who need a reliable collision avoidance reference
- Anyone sitting a maritime authority exam (MCA, USCG, AMSA, Transport Canada, MNI)

WHY COLREG 72

International collision avoidance rules are the foundation of safe navigation. Whether you are studying for the first time or refreshing knowledge before an exam, this app gives you the full text, visual aids, practice tests, and a realistic exam mode to build true confidence.

One-time purchase. No subscription. No ads. Study offline, anytime.

Download COLREG 72 and arrive at your exam prepared.

## Key features

- Interactive flashcards for COLREGs
- Content organized by specific rules
- Progress tracking
- Resetable results
- Learn navigational lights and shapes
- Improve vessel assessment skills

## Recent user reviews (10 of 17)

All indexed reviews: https://appshunter.io/ios/app/colreg-72-safety-at-sea/id1010178487/reviews.md

### 3/5 — Question

*2026-02-16, version 2.3.3*

How to change the language?

### 5/5 — Изменение фона

*2025-09-25*

Как изменить фон с темного на белый?

**Developer response:** Большое спасибо, что обратились к нам с этим вопросом. Мы ценим ваше желание настроить приложение под себя.
К сожалению, в текущей версии приложения функция смены темы (изменения фона с тёмного на белый и обратно) пока не реализована. Мы понимаем, насколько это важная возможность для многих пользователей, и уже рассматриваем её для добавления в будущих обновлениях.
Спасибо за понимание и помощь в улучшении нашего приложения!

### 3/5 — Неплохо, но…

*2025-04-17*

Нужно добавить Английский язык в правила, будет гораздо лучше!

**Developer response:** Уважаемый пользователь!
Благодарим Вас за то, что Вы с нами. Информируем Вас, что с момента первого релиза в AppStore наше приложение имело англоязычный интерфейс. Для его активации необходимо установить английский язык в настройках Вашего устройства.
Также рады сообщить, что приложение полностью переведено на испанский и французский языки.

### 1/5 — Glitches and folders wrong

*2024-10-26*

App glitches and says you’ve got thing wrong when they are right  and there will be sound questions in day shapes folder etc. unsure what’s going on.

**Developer response:** Thank you for your feedback. We’re sorry to hear about this issue.
In the latest version, we’ve fixed several glitches and improved how questions are organized across sections, including sounds and day shapes.
Please update the app and let us know if anything still looks incorrect.

### 1/5 — Not a good reference

*2024-02-02*

Many incorrect answers and mixed up info. Can’t trust this one for study.

### 5/5 — удобное приложение!

*2024-01-30*

UPD 2024.01.30:
в новых версиях приложения и после обновления iOS все работает как надо, спасибо! ставлю 5

исходный отзыв:
самый главный минус - не загружается теория а еще после возврата к предыдущему вопросу переход происходит не к следующему вопросу, а через один в комплексном тесте хорошо бы перемешать вопросы, потому что порядок ответов предсказуем (идет на нас, влево, вправо, от нас и тд)

**Developer response:** Здравствуйте! Спасибо что пользуетесь нашим приложением. 
 Для локализации обнаруженной Вами проблемы предлагаем выполнить следующие действия:
 1. Переустановить приложение из AppStore, предварительно удалив ранее установленное. Проверить работоспособность приложения.
 2. Если проблема останется, то просьба предоставить следующую информацию на E-mail(AppsForEach@gmail.com): 
 - тип устройства (iPad, iPhone);
 - модель устройства;
 - версию установленной на устройстве операционной системы iOS. 
Желательно, но не обязательно, приложить скриншоты или видео работы приложения в ошибочных ситуациях.

### 1/5 — Не работает теория !!!!!!!!!!

*2024-01-25*

Не работает теория !!!!!!!!!

**Developer response:** Здравствуйте! Спасибо что пользуетесь нашим приложением. 
Для локализации обнаруженной Вами проблемы предлагаем выполнить следующие действия:
1.	Переустановить приложение из AppStore, предварительно удалив ранее установленное. Проверить работоспособность приложения.
2.	Если проблема останется, то просьба предоставить следующую информацию на E-mail(AppsForEach@gmail.com): 
- тип устройства (iPad, iPhone);
- модель устройства;
- версию установленной на устройстве операционной системы iOS. 
Желательно, но не обязательно, приложить скриншоты или видео работы приложения в ошибочных ситуациях.

### 1/5 — Не работает

*2023-10-19*

Не работает теория, только тест

**Developer response:** Здравствуйте! Спасибо что пользуетесь нашим приложением.  Для локализации обнаруженной Вами проблемы предлагаем выполнить следующие действия: 1. Переустановить приложение из AppStore, предварительно удалив ранее установленное. Проверить работоспособность приложения. 2. Если проблема останется, то просьба предоставить следующую информацию на E-mail(AppsForEach@gmail.com):  - тип устройства (iPad, iPhone); - модель устройства; - версию установленной на устройстве операционной системы iOS. 
Желательно, но не обязательно, приложить скриншоты или видео работы приложения в ошибочных ситуациях.

### 3/5 — Можно улучшить

*2023-10-02*

В теории хотелось бы картинки по более лучшего качества. А в разделе В только текст который тоже было ты хороши сопроводить картинками. А то правила в бесплатном доступе в интернете из и так можно скачать

**Developer response:** Спасибо за ваш отзыв — очень ценим такие замечания.
В новой версии мы значительно улучшили качество изображений и в целом переработали раздел с теорией, чтобы сделать его более наглядным и удобным для изучения.
Надеемся, обновление вам понравится!

### 2/5 — Not a teach app. Just a quiz

*2023-03-10*

Just a series of quizzes.

It’s be good to teach first or explain the basics of each section before the quiz.

Sounds also don’t work in the sound module.

**Developer response:** Thank you for your feedback — we really appreciate it.
In the latest version, we’ve significantly improved how quizzes are integrated with theory, making it easier to learn the basics alongside practice. We’ve also noted your comment about the sound module and will look into it.

## Frequently asked questions about COLREG 72

### How does COLREG 72 help users learn?

COLREG 72 uses interactive flashcards organized by specific rules to make learning the International Regulations for Preventing Collisions at Sea more intuitive and efficient. The app helps users master and reinforce their knowledge of these critical maritime rules.

### What kind of content does COLREG 72 cover?

The app focuses on the International Regulations for Preventing Collisions at Sea (COLREGs-72), including detailed information on navigational lights, shapes, and sounds. This content is crucial for accurately assessing vessel positions and maneuverability.

### Can I track my learning progress with COLREG 72?

Yes, COLREG 72 automatically saves your answers, allowing you to track your progress through the material. You also have the option to reset your results if you wish to start fresh.

### Is COLREG 72 suitable for beginners?

Yes, COLREG 72 is designed for both experienced navigators and those preparing to become one. It provides a structured way to learn and reinforce essential knowledge for maritime safety.

### What devices does COLREG 72 support?

COLREG 72 is available on iPhone, iPad, and iPod devices. It is designed to be accessible on Apple's mobile platforms.

### How often is COLREG 72 updated?

The app was last updated on March 4, 2025, indicating ongoing support and potential for future improvements. The latest version is 2.3.3.

### What is the user sentiment for COLREG 72?

Users have rated COLREG 72 highly, with an average of 4.8 stars from 99 ratings. This suggests a very positive user experience and satisfaction with the app's effectiveness.

### Does COLREG 72 have ads?

No, COLREG 72 does not contain advertisements. The app is ad-free, providing an uninterrupted learning experience for users.

## Version history (last 5 releases)

### 2.7.0 — 2026-05-05

Smart Study Reminders
Turn on optional reminders and Vessel Lights will bring you back only when there is something useful to do: an unfinished exam, personal practice, or mistakes to review.

Respectful Timing
Reminders use quiet hours and weekly caps, so notifications stay focused and easy to control.

Reliability Fixes
Improved background sync for reminder profiles and fixed a rare secure-storage crash during startup.

### 2.6.0 — 2026-05-03

Exam Mode
Sit a full mock exam right inside the app — timed questions across all the rules, with a final score, a complete mistake review, and a comment on every wrong answer so you understand the reasoning, not just the result.

Built for iPad
The rules grid now fits more cards on a single screen, and an animated swipe hint guides you through the quiz — studying on a larger display feels properly native.

Polish and Fixes
Refined theory reader and rules list, more thorough localization across lights, sound signals, and theory, and more reliable offline content sync.

### 2.5.0 — 2026-04-29

Personalized Test
A brand-new test that targets your weak spots — practise the topics where you make the most mistakes, launched right from the home screen.

Quiz, Refreshed
Redesigned answers and explanations, refined progress bubbles, and a better layout on wide screens make studying smoother on every device.

Bug Fixes and Polish
Repaired sound and give-way cards, removed duplicate answer options, and kept your selected answer stable when ads load. Rule references are now properly localized throughout, and typography is more consistent.

### 2.4.0 — 2026-04-24

Theory Section Revamped
All theory illustrations have been replaced with updated images. Rule references now open in a popup overlay, keeping you in context while you read.

Reading Customization
Choose your preferred font type, adjust font size, and switch between 3 color themes (light, sepia, dark) for comfortable reading in any condition.

Theory Progress Tracking
The app now tracks which theory sections you have read, so you always know where you left off and what is still ahead.

Quiz Improvements
Multiple stability and navigation fixes. When you answer incorrectly or open a hint, a direct link appears to the relevant theory section so you can review and continue.

### 2.3.3 — 2025-03-04

App loading speed improved, minor bugs fixed.

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All apps by Smirnov Yury: https://appshunter.io/developer/420438416

## Related topics

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-02.*